It’s our turn to lead: Earth Day celebrates 45th anniversary.

This year’s Earth Day campaigns:  April 22nd marks the 45th anniversary of Earth Day. More than 1 billion people in 192 countries will take actions on Earth Day events this year, making it the largest environmental civic action in the world. Through Earth Day and our year round programs, Earth Day Network is the world’s … Read more

Permafrost ‘carbon bomb’ may be more of a slow burn, say scientists

Carbon dioxide from thawing Arctic permafrost is likely to be released gradually, rather than in a catastrophic eruption as previously predicted – but impact of emissions will still be great, new research suggests

What is your favorite place on Earth?

NASA Celebrates Earth Day with #NoPlaceLikeHome Event. There is #NoPlaceLikeHome, says NASA this Earth Day, April 22. The National Aeronautics and Space Administration is asking the global online community to share pictures and videos on social media that show there is no place like home – planet Earth. April 22nd marks the 45th anniversary of Earth … Read more

The answer lies in the soil and pesticides

Letters: A major research study by Newcastle University published last year found not only that organic fruit and veg contains more beneficial nutrients, but also four times less pesticide residues

Polar bears face starvation as unlikely to adapt to a land-based diet, says report

New research casts doubt on the theory that polar bears could survive habitat loss as sea ice declines by foraging for food on land

Is being vegan the most ethical way to live?

Reducing meat consumption is important, but going vegan may not solve all our problems…

If you have an ethical dilemma, email Lucy at lucy.siegle@observer.co.uk